Re: Reject unencrypted messages

2011-01-07 Thread Mikael Bak
IT geek 31 wrote: Outlook is all-or-nothing - it can force encryption for all recipients, regardless if they have a certificate or not, or none at all. Thunderbird and Enigmail can encrypt by default if a valid key is avalable. HTH, Mikael

Re: Reject unencrypted messages

2011-01-07 Thread IT geek 31
I'm not sure that's true. My Thunderbird just has the following options: Default encryption setting when sending messages: - Never (do not use encryption) - Required (can't send message unless all recipients have certificates) Again, all-or-nothing. A third option would be nice: - Sometimes

Re: Reject unencrypted messages

2011-01-07 Thread mouss
Le 07/01/2011 16:21, IT geek 31 a écrit : I'm not sure that's true. My Thunderbird just has the following options: Default encryption setting when sending messages: - Never (do not use encryption) - Required (can't send message unless all recipients have certificates) Again,

Reject unencrypted messages

2011-01-06 Thread IT geek 31
My accountant and I both have digital certificates and most of the time encrypt our mails. But he often forgets, meaning sensitive information is sent in plaintext. Is there any way to instruct Postfix to reject his mail unless it is encrypted? I know I can setup TLS, but that is something I

Re: Reject unencrypted messages

2011-01-06 Thread Ansgar Wiechers
On 2011-01-06 IT geek 31 wrote: My accountant and I both have digital certificates and most of the time encrypt our mails. But he often forgets, meaning sensitive information is sent in plaintext. Is there any way to instruct Postfix to reject his mail unless it is encrypted? I know I

Re: Reject unencrypted messages

2011-01-06 Thread IT geek 31
I am talking about the mail content, and I'm using S/MIME. Yes, I'm sure the accountant will never send me unencrypted mail. Thanks, On 6 January 2011 14:25, Ansgar Wiechers li...@planetcobalt.net wrote: On 2011-01-06 IT geek 31 wrote: My accountant and I both have digital certificates and

Re: Reject unencrypted messages

2011-01-06 Thread Tom Hendrikx
On 06/01/11 20:06, IT geek 31 wrote: I am talking about the mail content, and I'm using S/MIME. Yes, I'm sure the accountant will never send me unencrypted mail. Thanks, On 6 January 2011 14:25, Ansgar Wiechers li...@planetcobalt.net wrote: On 2011-01-06 IT geek 31 wrote: My

Re: Reject unencrypted messages

2011-01-06 Thread IT geek 31
On 6 January 2011 14:25, Ansgar Wiechers li...@planetcobalt.net wrote: On 2011-01-06 IT geek 31 wrote: My accountant and I both have digital certificates and most of the time encrypt our mails.  But he often forgets, meaning sensitive information is sent in plaintext. Is there any way to

Re: Reject unencrypted messages

2011-01-06 Thread Jerry
On Thu, 6 Jan 2011 19:21:56 + IT geek 31 itgee...@googlemail.com articulated: I think you've nailed it there Tom - I'm trying to teach better etiquette. Ideally I'd like a plugin for his mail client (Outlook) that automatically detects the recipient (me) and encrypts the mail, but I have

Re: Reject unencrypted messages

2011-01-06 Thread IT geek 31
On 6 January 2011 19:49, Jerry postfix-u...@seibercom.net wrote: On Thu, 6 Jan 2011 19:21:56 + IT geek 31 itgee...@googlemail.com articulated: I think you've nailed it there Tom - I'm trying to teach better etiquette.  Ideally I'd like a plugin for his mail client (Outlook) that

Re: Reject unencrypted messages

2011-01-06 Thread lst_hoe02
Zitat von IT geek 31 itgee...@googlemail.com: On 6 January 2011 19:49, Jerry postfix-u...@seibercom.net wrote: On Thu, 6 Jan 2011 19:21:56 + IT geek 31 itgee...@googlemail.com articulated: I think you've nailed it there Tom - I'm trying to teach better etiquette.  Ideally I'd like a

Re: Reject unencrypted messages

2011-01-06 Thread mouss
Le 06/01/2011 21:01, IT geek 31 a écrit : [snip] Outlook is all-or-nothing - it can force encryption for all recipients, regardless if they have a certificate or not, or none at all. AFAIK, it has no way of determining if a recipient has a certificate and if so forcing encryption.

Re: Reject unencrypted messages

2011-01-06 Thread IT geek 31
If you really like to do you might use header_checks to detect the Content-Type. Signed mail for example has Content-Type: multipart/signed. For header_checks have a look here http://www.postfix.org/header_checks.5.html, but be aware that the content has already leaked as others said. If you